Java Program to count number of vowels in a string

Solution #1:

1. package com.javatutorial;
2.  
3. public class CountNumberofVowels {
4.  
5.  public static void main(String[] args) {
6.   
7. System.out.println("Please enter a String");
8. Scanner in = new Scanner(System.in);                  
9.  String input = in.nextLine();
10.  
11.      char[] Chararray = input.toCharArray();
12.  
13.  int count = 0;
14.  
15.  for (char ch : Chararray) {
16.       switch (ch) {
17.              case 'a':
18.              case 'e':
19.              case 'i':
20.              case 'o':
21.              case 'u':
22.              case 'A':
23.              case 'E':
24.              case 'I':
25.              case 'O':
26.              case 'U':
27.                  count++;
28.      break;
29.      default:
30.             
31.      }
32.  }
33.        System.out.println("Number of vowels in String "+count);
34.  
35. }
36. 
    
37. }

Output:

1. Please enter a String
2. Instance Of Java
3. Number of vowels in String 6
    

Solution #2:

1. package com.javatutorial;
2.  
3. public class CountNumberofVowels {
4.  
5.  public static void main(String[] args) {
6.  
7.  int vowels = 0, digits = 0, blanks = 0; char ch; 
8. 
   
9. System.out.println("Please enter a String");
10. Scanner in = new Scanner(System.in);                  
11. String testString= in.nextLine();
12.  
13.  
14. for(int i = 0; i < testString.length(); i ++)
15. {
16.  
17.   ch = testString.charAt(i);
18.  
19.   if(ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' ||   
20.       ch == 'I' || ch == 'o' || ch == 'O' || ch == 'u' || ch == 'U')
21.           vowels ++;
22.        else if(Character.isDigit(ch))
23.           digits ++;
24.      else if(Character.isWhitespace(ch))
25.            blanks ++;
26.   }
27.  
28.     System.out.println("Vowels : " + vowels);
29.     System.out.println("Digits : " + digits);
30.     System.out.println("Blanks : " + blanks);           
31.    
32.  
33. }
34. 
    
35. }

Output:

1. Please enter a String
2. vowels and consonants
3. Vowels : 6
4. Digits : 0
5. Blanks : 2